Using PMAP to reroute C1OUT to P7.1 on MSP432P401R

Hi Guys,

since I did a mistake in hardware routing, I want the C1OUT (Comperator1 OUT) signal on the P7.1 port via PMAP. I am not quite sure if this is possible, but when it is, I am definetly doing something wrong in my software routines.

Here's my port mapping array:

/* Port mapper configuration register for C1OUT to P7.1*/
const uint8_t port_mapping[] =
{
        //Port P7:
		PM_CE1OUT, PM_NONE, PM_NONE, PM_NONE, PM_NONE, PM_NONE, PM_NONE,
        PM_NONE
};

and here's my comparator Initialization. I want to use the comparator to monitor a battery voltage, so that when it falls down the Vref value a LED will light up to show, that the battery needs to be charged. Iam using P5.7 as the COMP_IN and falsly connected P7.1 as the OUT Pin for driving the LED. Since P7.1 is normally C0OUT I want to use PMAP to route C1OUT to P7.1. Sadly it does not seem to work.

/* Comparator configuration structure */
const COMP_E_Config batMonitor =
{
COMP_E_VREF, // Positive Input Terminal
COMP_E_INPUT6, // Negative Input Terminal
COMP_E_FILTEROUTPUT_DLYLVL4, // Delay Level 4 Filter
COMP_E_NORMALOUTPUTPOLARITY, // Inverted Output Polarity
COMP_E_NORMAL_MODE// Ultra low power mode
};


bool init_batMonitor()
{
    /* Remapping  C1OUT to P7.1 */
    MAP_PMAP_configurePorts((const uint8_t *) port_mapping, PMAP_P7MAP, 1,
            PMAP_DISABLE_RECONFIGURATION);

	/* setting PORT5.7 to be comparator IN */
	MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN7, GPIO_TERTIARY_MODULE_FUNCTION);

	/* setting PORT7.1 as C0OUT for battery charging LED */
	MAP_GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P7, GPIO_PIN1,
	            GPIO_PRIMARY_MODULE_FUNCTION);

	/* Initialize the Comparator E module
	 *  Comparator Instance 1,
	 *  Reference Voltage to Positive(+) Terminal,
	 *  C1.6 to Negative(-) Terminal,
	 *  Ultra low Power Mode,
	 *  Output Filter On with max delay,
	 *  Inverted Output Polarity
	 */
	 if(!(MAP_COMP_E_initModule(COMP_E1_BASE, &batMonitor))) return false;

	/*Set the reference voltage that is being supplied to the (+) terminal
	 *  Comparator Instance 1,
	 *  Reference Voltage of 2,5V,
	 *  Lower Limit of 2,5V*(20/32) = 2,5V*0,62, (aprox. 1,55v respective for 3,1V/2; see MAX8903 datasheet for VBATPQ )
	 *  Upper Limit of 2,5V*(20/32)
	 */
	MAP_COMP_E_setReferenceVoltage(COMP_E1_BASE, COMP_E_VREFBASE2_5V,
										20, 20);

	/* setting COMP_E reference accuracy to clocked for low power */
	//MAP_COMP_E_setReferenceAccuracy(COMP_E1_BASE,COMP_E_ACCURACY_CLOCKED);

	/* Disable Input Buffer on P5.6/C1.6
	 *  Base Address of Comparator E1,
	 *  Input Buffer port
	 *  Selecting the CEx input pin to the comparator
	 *  multiplexer with the CEx bits automatically
	 *  disables output driver and input buffer for
	 *  that pin, regardless of the state of the
	 *  associated CEPD.x bit
	 */
	MAP_COMP_E_disableInputBuffer(COMP_E1_BASE, COMP_E_INPUT6);

	/* Allow power to Comparator module */
	MAP_COMP_E_enableModule(COMP_E1_BASE);

	/* Delaying to allow comparator to settle */
	uint_fast16_t ii;
	for (ii = 0; ii < 400; ii++);

	return true;
}